Preparation and Characterization of (C₆H₅C₂H₄NH₃)₂PbX₄ Perovskite Materials

Abstract

The organic–inorganic hybrid perovskite is a new material obtained by compounding an inorganic component and an organic component on a molecular structure, and has the advantages of them, so that the material has good electroluminescence and photoluminescence effect, good mechanical processing characteristics, etc. In this paper, we synthesized (C₆H₅C₂H₄NH₃)₂PbX₄ (X=Cl, Br, I) by using a liquid phase method. The structure and luminescence properties of perovskite materials were controlled by adjusting the reaction temperature and using different halogen elements. The experimental results show that the (C₆H₅C₂H₄NH₃)₂PbI₄ materials obtained at different reaction temperatures have a layered structure, and their crystallization quality decrease with increasing temperature. In addition, when the X ion is replaced by Br and Cl ions, both synthesized materials have an obvious layered crystal structure, indicating that the type of halogen ion does not affect the crystallization process and the layered structure. However, the photoluminescence spectrum peaks of the materials with different halogen ion are obviously different, verifying that the energy band structure of the material can be well regulated by changing the halogen ions.